There's a long tradition of using targeting beams or other methods of seeing more clearly the interaction between where you're shooting and where you want to shoot. Tracer ammunition is the traditional approach with guns, in which some of the bullets or shells have pyrotechnics in them to make their trajectory visible. This allows the shooter to correct their aim.

You could even adopt a similar approach in a pseudo-medieval or even earlier setting, with some sort of "tracer arrows". Or in magical settings there might even be tracer spells!